Ni3 Al alloy of improved ductility based on iron substituent

Abstract

A melt is provided having the formula (Ni.sub.1-x Al.sub.x).sub.99-y Fe.sub.y B.sub.1 The melt is rapidly solidified as ribbon and the ribbon is annealed at about 100° C. Desirable properties are found when x is between 0.21 and 0.26 and y is between 5 and 15.

What is claimed and sought to be protected by Letters Patent of the United States is as follows: 
     
       1. As a composition of matter, a γ' nickel aluminide base alloy of the following composition   (Ni.sub.1-x Al.sub.x).sub.99-y Fe.sub.y B.sub.1)     wherein x of the above formula is between 0.21 and 0.26 and wherein y in the above formula is between 5 and 15,   said aluminide being rapidly solidified and having an L1 2  type crystal structure.   
     
     
       2. The composition of claim 1 in which x is 0.23 to 0.25. 
     
     
       3. The method of preparing a γ' phase iron substituted tri-nickel aluminide base alloy which comprises preparing a composition as follows:   (Ni.sub.1-x Al.sub.x).sub.99-y Fe.sub.y B.sub.1     wherein x is between 0.21 and 0.26 and y is between 5 and 15, preparing a melt of the composition and rapidly solidifying the melt.   
     
     
       4. The method of claim 3 in which the x is 0.23 to 0.25. 
     
     
       5. The method of claim 3 in which the rapidly solidified material is prepared and is consolidated. 
     
     
       6. The method of claim 3 in which the rapidly solidified composition is consolidated by heating and pressing at 1000° C. for about 2 hours. 
     
     
       7. As a composition of matter, a γ' nickel aluminide base alloy of the following composition   (Ni.sub.1-x Al.sub.x).sub.89 Fe.sub.10 B.sub.1)     wherein x of the above formula is between 0.21 and 0.26,   said aluminide being rapidly solidified and having an L1 2  type crystal structure.